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Finding the Fourth Proportional to 171,989.88, 257,986.26 and 47,337.72

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Solution

The fourth proportional to 171,989.88, 257,986.26 and 47,337.72 is: 71,006.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,989.88 : 257,986.26 = 47,337.72 : x
  2. Step 2: Convert to fraction form
    171,989.88/257,986.26 = 47,337.72/x
  3. Step 3: Cross multiply
    171,989.88x = 257,986.26 × 47,337.72
  4. Step 4: Simplify right side
    171,989.88x = 12,212,481,339.73
  5. Step 5: Solve for x
    x = 12,212,481,339.73/171,989.88
  6. Step 6: Final answer
    x = 71,006.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.